public Questionnaire BuildAST(string inputString)
{
MemoryStream inputStream = new MemoryStream(Encoding.UTF8.GetBytes(inputString ?? ""));
AntlrInputStream antlrInputStream = new AntlrInputStream(inputStream);
QLLexer lexer = new QLLexer(antlrInputStream);
CommonTokenStream tokens = new CommonTokenStream(lexer);
_parser = new QLParser(tokens);
//Replaxe lexer/parser error listeners
lexer.RemoveErrorListeners();
_parser.RemoveErrorListeners();
lexer.AddErrorListener(new LexerErrorListener() { OnError = LexerErrors.Add });
_parser.AddErrorListener(new ParserErrorListener() { OnError = ParserErrors.Add });
//set manager on partial parser class
_parser.SetIdManager(Memory);
//build AST
_parseTree = _parser.questionnaire();
AST = _parser.GetAST();
//check for lexer/parser errors
if (!LexerErrors.Any() && !ParserErrors.Any())
{
TypeChecker.Run(AST);
}
return AST;
}
public Questionnaire BuildAST(string inputString)
{
MemoryStream inputStream = new MemoryStream(Encoding.UTF8.GetBytes(inputString ?? ""));
AntlrInputStream antlrInputStream = new AntlrInputStream(inputStream);
QLLexer lexer = new QLLexer(antlrInputStream);
CommonTokenStream tokens = new CommonTokenStream(lexer);
_parser = new QLParser(tokens);
//Replaxe lexer/parser error listeners
lexer.RemoveErrorListeners();
_parser.RemoveErrorListeners();
lexer.AddErrorListener(new LexerErrorListener()
{
OnError = LexerErrors.Add
});
_parser.AddErrorListener(new ParserErrorListener()
{
OnError = ParserErrors.Add
});
//set manager on partial parser class
_parser.SetIdManager(Memory);
//build AST
_parseTree = _parser.questionnaire();
AST = _parser.GetAST();
//check for lexer/parser errors
if (!LexerErrors.Any() && !ParserErrors.Any())
{
TypeChecker.Run(AST);
}
return(AST);
}
public override void EnterQuestionnaire(QLParser.QuestionnaireContext context)
{
base.EnterQuestionnaire(context);
}
private void btnParse_Click(object sender, EventArgs e)
{
txtOutput.Clear();
string inputString = txtInput.Text;
MemoryStream inputStream = new MemoryStream(Encoding.UTF8.GetBytes(inputString ?? ""));
AntlrInputStream input = new AntlrInputStream(inputStream);
QLLexer lexer = new QLLexer(input);
CommonTokenStream tokens = new CommonTokenStream(lexer);
QLParser parser = new QLParser(tokens);
lexer.RemoveErrorListeners();
parser.RemoveErrorListeners();
lexer.AddErrorListener(new LexerErrorListener(){OnError = WriteError});
parser.AddErrorListener(new ParserErrorListener(){OnError = WriteError});
IParseTree tree = parser.questionnaire();
//if (parser.NumberOfSyntaxErrors > 0)
// txtOutput.Text += string.Format("Parser errors found: {0}", parser.NumberOfSyntaxErrors);
QLVisitor visitor = new QLVisitor();
visitor.Visit(tree);
txtOutput.Text += string.Format(@"{0}{0} Generated parse tree:
{0} {1}
{0} {2}"
, Environment.NewLine
, tree.ToStringTree(parser)
, visitor.Visit(tree));
}